package com.itheima.reggie.common;

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import java.sql.SQLIntegrityConstraintViolationException;

//全局异常处理器
@ControllerAdvice(annotations = {RestController.class, Controller.class})
//可以直接return响应前端json数据
@ResponseBody
//日志信息
@Slf4j
public class GlobalExceptionHandler {

    //异常处理方法:专门针对SQLIntegrityConstraintViolationException这种异常
    @ExceptionHandler(SQLIntegrityConstraintViolationException.class)
    public R<String> exceptionHandler(SQLIntegrityConstraintViolationException ex) {
        //
        log.error(ex.getMessage());
        if(ex.getMessage().contains("Duplicate entry")){
            String[] split = ex.getMessage().split(" ");
            String msg = split[2];
            return R.fail("用户名"+msg+"已被使用");
        }
        return R.fail("未知错误");
    }
}
